Wrapping machine



Aug. 24,1926. 1,597,541

. H. A. SV|GN ET AL WRAPPING MACHINE Filed Feb. 19, 1926 Patented Aug.24, 1926.

y 1,591,541 UNITED STATES PATENT OFFICE.

HENRI A. SVIGN, F WINTHROP, MASSACHUSETTS, AND EPHRAIM H. CHABOT, 0F

NASHUA, NEW HAMPSHIRE, ASSIGNORS T0 NATIONAL BREAD WRAPPING MA- CHINECOMPANY, 0F BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

WRAPPING MACHINE.

i Application led February 19, 1926. Serial No. 89,319.

This invention relates to. machinesl for cutting paper into sections andhas particular reference to that type of machine which intermittentlydraws paper from a supply roll and pushes it to position where a knifecuts it transversely.

In machines of the type shown in Letters Patent No. 1,253,636, grantedJanuary 15, 1918 to Sevigne and Arnold, paper to form l0 bread wrappersections is intermittent-ly fed from a supply roll, over a bed, toposition to be cut. In such machines a presser foot bears intermittentlyon the paper and holds it stationary on the bed, while the knife israised, so that when the next feed of the paper occurs an exactpredetermined length will be cut-off. It has been found that suchpresser foot sometimes causes the paper to stick to the bed, resultingin some interference with starting the paper along for the next feed.

The object of the present invent1on 1s to provide means located toautomatlcally act on the paper before it reaches the feeding means, toprevent retrograde movement of the paper. With this object in view thein-` vention consists in the construction and combination of partssubstantially as hereinafter described and claimed. U

Of the accompaying drawings which 1llustrate so much of a paper feedingand cutting machine of the type above referred to as is necessary to anexplanation of the present inventionthe essential parts of the' machine.

Figure 2 is a view looking in the direction of the arrow 2.

Similar reference characters indicate similar parts in both views.

A drum 83 and a roll 87 carried by ashaft 89 intermittently push or feedthe web of paper over a bed 88 whichv is transversely slotted for thepassage of a knife 129 which is raised and lowered by any suitable meanssuch as suitable connections with arms 132 of a rock shaft 133.

Assuming that the intermittent feeding of the web'of paper is effectedby lnternnttently raising the roll or rolls 87 so there will be nocooperation with the drum 83, as explained in the patent referred to,the

Figure 1 is a sectional side elevation of paper would then be liable tobe pulled .back

by the tension-device usually employed.

The numerals employed herein are the same as those which designate partshaving` similar numerals in the vpatent hereinbefore referred to, towhich reference may be had if further explanation of the said parts andtheir operation is desired. Letters of reference 4are employed todesignate the parts which cooperate with those having numerals inattaining the object of the present invention. To prevent backwardmovement of the paper, the paper is automatically held or grippedagainst backward movement while on its way to the feeding members 83 87.Said paper after passing the gravity rolls 84 85, passes over what maybe referred to as a guide rod a which, preferably, is free to rotate insuitable bearings provided in the frame 40.

Also supported by the frame 40 is a bar b to which is secured dependinbracket c, the latter having a pivot pin dgon which one two or 'moreblocks e are mounted. Said blocks have cam-shaped peripheries bearing onthe paper while it is guided by the support or rod a. Said' blocks havefriction faces and are preferably, for convenience, formed of rubber.

It will now be understood that each-time that the roll 87 descends uponthe paper, the paper-will be drawn' over the guide a. As is explained inthe patent hereinbefore referred to, the roll 87 and drum 83 areconstantly driven inthe direction indicated by the arrows, Figure 1.This results in lifting one or both of the gravity rolls 84 85 whichthen, sliding down, must draw paper from the roll on the core 82. Thefriction block or blocks e permit the paper to be readily drawn alongfor feeding a correct distance, but when the upper roll or rolls 87rise, to arrest the feeding action, the blocks e automatically grip thepaper against the guide or rod a, thereby assuring accuracy of thelengths of paper to` be cut by the knife 129.

The atent hereinbefore referred to is for a bread) wrapping machine, butwe do not limit ourselves so far as the tion is concerned, to anyparticular machine whichl cuts and feeds paper, and for this resentinvenreason we deem it unnecessary to illustrate non-essential parts ofan com lete machine.

Having now describe our invention, we claimz- 1. In a Wrappingmachine'having means for intermittently feeding a web of paper andcutting it into sections to form wrapers, a support over which the webis drawn y the -feeding means, automatic means coacting with saldsupport for preventing the web from moving backward, and means foreffecting a constant backward pull on the paper.`

2. In a Wrapping machine maving means for intermittently feeding a webof paper and `cutting it into sections to 'form wrappers, anautomatically operating device for preventing the web from movinbackward, and constantly effective means or exerting a backward pull onthe paper.

3. In a wrapping machine having means for intermittently feeding a webof paper and cutting it into-sections to form.wrap

ers, a support over which the web is drawn y the feeding means,gravitating tension devices for exerting a backward pull on 'the paper,and a loosely mounted friction member in position to .prevent backwardmovement of the web.

4. In a wrapping machinev having means for intermittently feeding a webof paper and cutting it into sections to form wrappers, a support overwhich the web is drawn by the feeding means, gravitating tension devicesfor exerting a backward pull on the paper, and a loosely pivotedfriction member having a cam-shaped surface bearing on the webtravellingover said support.

5. In a machine having means for inter- -mittently drawing a web ofpaper from a HENRI A. SVIGNE. Y EPHRAIM H. oHABoT.

